i m using EINT 2 on port P0.a5 on LPC 2148
here is my code ..can anyone guide me pls..
PINSEL0 = 0x80000000; //Select P0.7 for EINT2 VICIntSelect = 0x00; VICVectCntl1 = 0x20 | 0x10; //EINT 2 is selected VICVectAddr1 = (unsigned long) intr2_srv; VICIntEnable = 1<<0x10; EXTMODE = 0x04; EXTPOLAR = 0x04; // HIGH Level
Remember: many parts of the world are still asleep at this time!
After only 1 hour you're getting impatient already?
This is a discussion forum - not a free consultancy service! And, if you want an express consultancy service, you must expect to pay a premium for that!
Rather than just nagging, it would be more helpful if you would actually supply some useful information about your problem.
You have just said that it "doesn't work" - which is like saying, "my car doesn't work - what's wrong with it"
What debugging have you done to find out what's actually happening?
Have you studied the manufacturer's documentation for guidance?
et, etc,...
www.8052.com/.../120313
Since we're talking about an external interupt, note that includes harware debugging - have you verified that a valid signal is actually present at the required input pin...?
yes i have connected a wire to am giving high to low pulse..n m checking the singal on port0.15.
and i have also timer to give delay ...so when i comment interrupt part its running fine. but when i start interrupt led doest glow..
So maybe your interrupt does work, but your interrupt handler doesn't acknowledge the interrupt?
You see - you haven't shown us what your ISR looks like.
i have also checked in debugging that interrupt is selected ...(keil debugger).
this is the interrupt routine...
void intr2_srv (void) __irq { manual(); T0IR = 0x01; EXTINT |=0x04; //clear interrupt VICVectAddr = 0; // Acknowledge Interrupt } void manual() // For blinking LEDs after 1sec delay. { IOSET0 =0x00000001; timer0(2000); IOCLR0 =0x00000001; timer0(2000); }
pls give some idea...